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Taking The Alternative Route

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The cement industry can be leaders of change by taking the route of sustainability, using alternatives to conventional methods that shall positively impact the demand and meet goals set by global bodies. Kanika Mathur takes a deep dive into the various alternative fuels and raw materials the cement industry can depend upon to build a better and stronger future.

The world is going through a crisis. Natural resources are depleting, greenhouse gases are being emitted and pollution is on the rise. According to Fortune Business Insights, the global cement market is projected to grow from $326.80 billion in 2021 to $458.64 billion in 2028 at a CAGR of 5.1 per cent during the 2021-2028 period. The sudden rise is attributed to this market’s demand and growth, returning to the pre-pandemic levels once the pandemic is over.
In 2021, India also has chalked plans for infrastructural development like the ‘PM Gati Shakti – National Master Plan (NMP)’ for multimodal connectivity and is aiming for 100 smart cities. The Government also intends to expand the capacity of railways and the facilities for handling and storage to ease the transportation of cement and reduce transportation cost. These measures would lead to an increased construction activity, thereby boosting cement demand. The Union Budget allocated Rs. 13,750 crore (US$ 1.88 billion) and Rs. 12,294 crore (US$ 1.68 billion) for Urban Rejuvenation Mission: AMRUT and Smart Cities Mission and Swachh Bharat Mission, respectively and Rs. 27,500 crore (US$ 3.77 billion) has been allotted under Pradhan Mantri Awas Yojana, as published in the Indian Brand Equity Foundation Report for Indian Cement Industry Analysis 2021.
With the progressing economy and surging demand for cement and concrete, there is growth in infrastructure, but resources are getting exhausted by the day and the environment is facing that impact. It is imperative that an industry of this magnitude take steps by looking for alternative raw materials and fuels to meet the rising demand as well as protect natural reserves and nature on a whole.

Cement manufacturing process and conventional fuels and raw materials
All over the world, cement is one of the most important building materials. The process starts with extracting raw materials, crushing and transporting them to the manufacturing facility. The most important raw materials for making cement are limestone, clay and marl. These are extracted from quarries by blasting or by ripping using heavy machinery. Wheel loaders and dumper trucks transport the raw materials to the crushing installations. There the rock is broken down to roughly the size used in road metaling. It is then blended and homogenised, dried, and grinded.
The prepared raw material is then burned at approx. 1,450°C in a kiln. In this process, a chemical conversion takes place where carbon dioxide is emitted, and the product is the clinker.
Once the burnt clinker is cooled down, it is stored in clinker silos. From there the clinker is conveyed to ball mills or roller presses, in which it is ground down to very fine cement, with the addition of gypsum and anhydrite, as well as other additives, depending on the use to which the cement is to be put. The finished cement is stored in separate silos, depending on type and strength class.
The fuel used to heat the kiln is mainly coal which is a naturally occurring resource that is getting extinct by the day and also emits carbon. Similarly, limestone in the chemical process produces a large amount of carbon dioxide. This leads to the need of alternative raw materials and fuels in the cement manufacturing process.

Switching to alternative fuels and raw materials
Fuel is majorly required to heat the kiln. The products that would otherwise unrecyclable and may end up in landfills can serve as the perfect fuel for burning in the kilns. This would also mean disposing off the waste that may have polluted the land or sea.
By their nature, these fuels can be variable in quality, behaviour, moisture content and calorific value and will be difficult to convey, store, discharge and accurately dose into the fuel stream. Alternative fuels can help to reduce CO2 emissions.
Some of the widely used fuels that the industry is switching over to are: Refuse Derived Fuel (RDF), Solid Recovered Fuels (SRF), Wood, Waste Wood, Agricultural Waste, Tyre Derived Fuel, Meat and Bone Meal (MBM), Sewage Sludge Profuel, Chemical Residues, Oil Seeds, Municipal Solid Waste (MSW) and Sludge.
Leading cement manufacturing organisations have aligned themselves with the mission of the United Nations to achieve Net Zero Environment by 2050 and are on a pathway of creating greener solutions by switching to these fuels.
Saurabh Palsania, Executive Director, Dalmia Cement says “Cement industry has been using waste since its inception, be it fly ash or slag as an alternative fuel. Use of MSW in the cement industry is as good as fuel, but it comes with its own set of challenges. There are approximately 2000 sump sites and as per records there are about 1855 lakh tonnes of waste lying across India. The kilns in the cement industry that run at over 1300 degree Celsius can easily consume the waste and prevent it from ending up in landfills”.
“The industry has tie ups across multiple municipal corporations. We must improve our equipment and better utilise this available resource that can substitute carbon intensive fuels. We must also make this sector an organised sector for seamless operations” he adds.
Limestone makes up for 95 per cent of the raw material used in cement production. According to some estimates as mentioned by the Cement Manufacturers Association, around 180-250 kg of coal and about 1.5 tonne of limestone is required to produce a tonne of cement. Cement manufacturing also consumes minerals such as gypsum, Quartz, bauxite, coal, kaolin (china clay) and iron ore too in varying amounts.
Limestone is a naturally occurring mineral. Large amounts of limestone are calcified in cement manufacturing units to produce cement which leads to rapid depletion of this resource. It also emits a large amount of carbon dioxide in the process.
Cement industry has taken this into consideration and are moving towards materials like clay, chalk etc. to produce clinker that is less energy intensive and has reduced emission of carbon dioxide. These steps are important to ensure that the resource is conserved in nature and does not harm the environment as the chemical process cannot be changed. Organisations are constantly looking for innovations in the field of raw material and have employed experts in the field of alternative fuels and raw materials to come up with more sustainable solutions for this process.

Waste as an alternative to fuel and raw materials in the cement industry
Various types of cement have been introduced in the recent past by cement technologists the world over. Most of these cements have been developed by the addition of alternative waste (also known as SCM, supplementary cementitious materials) produced by other industries. Fly ash and various slags produced by metal industries are the two of the most significant components added as raw materials to the clinker production in cement kilns. Additionally, limestone is also used as a component of cement.
These additives are independently added as well as in combination in permissible percentages in the cement mixture along with clinker. Fly ash and GGBS slag are added in cement grinding to produce PPC and PSC cement. This combination of clinker, fly ash, and slag along with gypsum is used in cement grinding. The combinations of these three raw materials are based on the physical and chemical characteristics of the waste materials.
Similarly, organisations are working on supporting the circular economy concept and are collaborating with other organisations to collect various types of waste like plastic waste, agricultural waste, pharmaceutical waste etc. to use in the kilns and produce the required heat while substituting the role of coal in this process. This creates a huge impact on the environment in a positive manner as waste from the other industries does not pollute the land or water bodies and reduces the consumption of coal in cement making process.
According to Manoj Rustogi, Head – Sustainability, JSW Cement, “Wastage recovery is a very valid process in the alternative fuel and raw material context. As a policy intervention, recognising wastage recovery as a renewable power because there is no additional material used. It is the waste coming out from the cement making process that is used and tapped for electricity and power generation. 70 per cent of power requirement for clinker production can come from wastage recovery”.
“Another source of energy organisations must tap is solar energy. Combining the energy from waste recovery and solar power can take care of energy requirements of certain types of cements. A push from the government is required to adapt to this form of energy and it will surely take away a major chunk of carbon emission that we are currently dealing with” he adds.

Other efforts towards creating a sustainable environment
Leaders in cement manufacturing, organisations are taking the greener routes to keep the environment condition in check. From waste management facilities to rainwater harvesting and use of alternative fuels and raw materials, a lot of effort is being taken to develop a green economy.
Predicting the future of cement production, fuels and raw materials, SK Rathore, President, JK Cement says, “The world is now looking towards hydrogen as a green fuel. It is depending on how hydrogen is produced that makes it green and it is an expensive process. Another method of making cement greener and reducing the emission of carbon in the cement manufacturing process is the reduction of losses during clinker production with technological innovation”. He believes that development in these areas will be key in the near future and the cement industry will be quick to adapt to them for a better tomorrow and cleaner environment.
Pledging towards a net zero environment and building a better environment for the country is the goal of the cement industry in the decades to come. For this they are taking all efforts to look for alternative sources of energy as well as raw materials that does not compromise with the quality of the end product but also improves the operation process and gives least harm to the environment. Technical innovations and research in the area is sure to come up with solutions that will let the industry achieve their goals in the race to 2050.

Kanika Mathur

Concrete

Merlin Prime Spaces Acquires 13,185 Sq M Land Parcel In Pune

Rs 273 crore purchase broadens the developer’s Pune presence

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Merlin Prime Spaces (MPS) has acquired a 13,185 sq m land parcel in Pune for Rs 273 crore, marking a notable expansion of its footprint in the city.

The transaction value converts to Rs 2,730 mn or Rs 2.73 bn.

The parcel is located in a strategic area of Pune and the firm described the acquisition as aligned with its growth objectives.

The deal follows recent activity in the region and will be watched by investors and developers.

MPS said the acquisition will support its planned development pipeline and enable delivery of commercial and residential space to meet local demand.

The company expects the site to provide flexibility in product design and phased development to respond to market conditions.

The move reflects an emphasis on land ownership in key suburban markets.

The emphasis on land acquisition reflects a strategy to secure inventory ahead of demand cycles.

The purchase follows a period of sustained investor interest in Pune real estate, driven by expanding office ecosystems and residential demand from professionals.

MPS will integrate the new holding into its existing portfolio and plans to engage with local authorities and stakeholders to progress approvals and infrastructure readiness.

No financial partners were disclosed in the announcement.

The firm indicated that timelines will depend on approvals and prevailing market conditions.

Analysts note that strategic land acquisitions at scale can help developers manage costs and timelines while preserving optionality for future projects.

MPS will now hold an enlarged land bank in the region as it pursues growth, and the acquisition underlines continued corporate appetite for measured expansion in second tier cities.

The company intends to move forward with detailed planning in the coming months.

Stakeholders will assess how the site is positioned relative to existing infrastructure and connectivity.

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Concrete

Adani Cement and Naredco Partner to Promote Sustainable Construction

Collaboration to focus on skills, technology and greener practices

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Adani Cement has entered a strategic partnership with the National Real Estate Development Council (Naredco) to support India’s construction needs with a focus on sustainability, workforce capability and modern building technologies. The collaboration brings together Adani Cement’s building materials portfolio, research and development strengths and technical expertise with Naredco’s nationwide network of more than 15,000 member organisations. The agreement aims to address evolving demand across housing, commercial and infrastructure sectors.

Under the partnership, the organisations will roll out skill development and certification programmes for masons, contractors and site supervisors, with training to emphasise contemporary construction techniques, safety practices and quality standards. The programmes are intended to improve project execution and on-site efficiency and to raise labour productivity through standardised competencies. Emphasis will be placed on practical training and certification pathways that can be scaled across regions.

The alliance will function as a platform for knowledge sharing and technology exchange, facilitating access to advanced concrete solutions, innovative construction practices and modern materials. The effort is intended to enhance structural durability, execution quality and environmental responsibility across developments while promoting adoption of low-carbon technologies and green cement alternatives. Companies expect these measures to contribute to longer term resilience of built assets.

Senior executives conveyed that the partnership reflects a shared commitment to strengthening quality and sustainability in construction and that closer engagement with developers will help integrate advanced materials and technical support throughout the project lifecycle. Leadership noted the need for responsible construction practices as urbanisation accelerates and indicated that the association should encourage wider adoption of green building norms and collaboration within the real estate and construction ecosystem.

The organisations said they will also explore integrated building solutions, including ready-mix concrete offerings, while supporting initiatives aligned with affordable and inclusive housing. The partnership will progress through engagements, conferences and joint training programmes targeting rapidly urbanising cities and growth centres where demand for efficient and environmentally responsible construction grows. Naredco, established under the aegis of the Ministry of Housing and Urban Affairs, will leverage its policy and advocacy role to support implementation.

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Concrete

Operational Excellence Redefined!

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Operational excellence in cement is no longer about producing more—it is about producing smarter, cleaner and more reliably, where cost per tonne meets carbon per tonne.

Operational excellence in cement has moved far beyond the old pursuit of ‘more tonne’. The new benchmark is smarter, cleaner, more reliable production—delivered with discipline across process, people and data. In an industry where energy can account for nearly 30 per cent of manufacturing cost, even marginal gains translate into meaningful value. As Dr SB Hegde, Professor, Jain College of Engineering & Technology, Hubli and Visiting Professor, Pennsylvania State University, USA, puts it, “Operational excellence… is no longer about producing more. It is about producing smarter, cleaner, more reliably, and more sustainably.” The shift is structural: carbon per tonne will increasingly matter as much as cost per tonne, and competitiveness will be defined by the ability to stabilise operations while steadily lowering emissions.

From control rooms to command centres

The modern cement plant is no longer a handful of loops watched by a few operators. Control rooms have evolved from a few hundred signals to thousands—today, up to 25,000 signals can compete for attention. Dr Rizwan Sabjan, Head – Global Sales and Proposals, Process Control and Optimization, Fuller Technologies, frames the core problem plainly: plants have added WHRS circuits, alternative fuels, higher line capacities and tighter quality expectations, but human attention remains finite. “It is very impossible for an operator to operate the plant with so many things being added,” he says. “We need somebody who can operate 24×7… without any tiredness, without any distraction… The software can do that for us better.”

This is where advanced process control shifts from ‘automation spend’ to a financial lever. Dr Hegde underlines the logic: “Automation is not a technology expense. It is a financial strategy.” In large kilns, a one per cent improvement is not incremental—it is compounding.

Stability is the new productivity

At the heart of operational excellence lies stability. Not because stability is comfortable, but because it is profitable—and increasingly, low-carbon. When setpoints drift and operators chase variability, costs hide in refractory damage, thermal shocks, stop-start losses and quality swings. Dr Sabjan argues that algorithmic control can absorb process disturbances faster than any operator, acting as ‘a co-pilot or an autopilot’, making changes ‘as quick as possible’ rather than waiting for manual intervention. The result is not just fuel saving—it is steadier operation that extends refractory life and reduces avoidable downtime.

The pay-off can be seen through the lens of variability: manual operation often amplifies swings, while closed-loop optimisation tightens control. As Dr Sabjan notes, “It’s not only about savings… there are many indirect benefits, like increasing the refractory life, because we are avoiding the thermal shocks.”

Quality control

If stability is the base, quality is the multiplier. A high-capacity plant can dispatch enormous volumes daily, and quality cannot be a periodic check—it must be continuous. Yet, as Dr Sabjan points out, the biggest error is not in analysis equipment but upstream: “80 per cent of the error is happening at the sampling level.” If sampling is inconsistent, even the best XRF and XRD become expensive spectators.

Automation closes the loop by standardising sample collection, transport, preparation, analysis and corrective action. “We do invest a lot of money on analytical equipment like XRD and XRF, but if it is not put on the closed loop then there’s no use of it,” he says, because results become person-dependent and slow.

Raju Ramachandran, Chief Manufacturing Officer (East), Nuvoco Vistas Corp, reinforces the operational impact from the plant floor: “There’s a stark difference in what a RoboLab does… ensuring that the consistent quality is there… starts right from the sample collection.” For him, automation is not about removing people; it is about making outcomes repeatable.

Human-centric automation

One of the biggest barriers to performance is not hardware—it is fear. Dr Sabjan describes a persistent concern that digital tools exist to replace operators. “That’s not the way,” he says. “The technology is here to help operator… not to replace them… but to complement them.” The plants that realise this early tend to sustain performance because adoption becomes collaborative rather than forced.

Dr Hegde adds an important caveat: tools can mislead without competence. “If you don’t have the knowledge about the data… this will mislead you… it is like… using ChatGPT… it may tell the garbage.” His point is not anti-technology; it is pro-capability. Operational excellence now requires multidisciplinary teams—process, chemistry, physics, automation and reliability—working as one.

GS Daga, Managing Director, SecMec Consultants, takes the argument further, warning that the technology curve can outpace human readiness: “Our technology movement AI will move fast, and our people will be lagging behind.” For him, the industry’s most urgent intervention is systematic skilling—paired with the environment to apply those skills. Without that, even high-end systems remain underutilised.

Digital energy management

Digital optimisation is no longer confined to pilots; its impact is increasingly quantifiable. Raghu Vokuda, Chief Digital Officer, JSW Cement, describes the outcomes in practical terms: reductions in specific power consumption ‘close to 3 per cent to 7 per cent’, improvements in process stability ‘10 per cent to 20 per cent’, and thermal energy reductions ‘2–5 per cent’. He also highlights value beyond the process line—demand optimisation through forecasting models can reduce peak charges, and optimisation of WHRS can deliver ‘1 per cent to 3 per cent’ efficiency gains.

What matters is the operating approach. Rather than patchwork point solutions, he advocates blueprinting a model digital plant across pillars—maintenance, quality, energy, process, people, safety and sustainability—and then scaling. The difference is governance: defined ownership of data, harmonised OT–IT integration, and dashboards designed for each decision layer—from shopfloor to plant head to network leadership.

Predictive maintenance

Reliability has become a boardroom priority because the cost of failure is blunt and immediate. Dr Hegde captures it crisply: “One day of kiln stoppage can cost several crores.” Predictive maintenance and condition monitoring change reliability from reaction to anticipation—provided plants invest in the right sensors and a holistic architecture.

Dr Sabjan stresses the need for ‘extra investment’ where existing instrumentation is insufficient—kiln shell monitoring, refractory monitoring and other critical measurements. The goal is early warning: “How to have those pre-warnings… where the failures are going to come… and then ensure that the plant availability is high, the downtime is low.”

Ramachandran adds that IoT sensors are increasingly enabling early intervention—temperature rise in bearings, vibration patterns, motor and gearbox signals—moving from prediction to prescription. The operational advantage is not only fewer failures, but planned shutdowns: “Once the shutdown is planned in advance… you have lesser… unpredictable downtimes… and overall… you gain on the productivity.”

Alternative fuels and raw materials

As decarbonisation tightens, AFR becomes central—but scaling it is not simply a procurement decision. Vimal Kumar Jain, Technical Director, Heidelberg Cement, frames AFR as a structured programme built on three foundations: strong pre-processing infrastructure, consistent AFR quality, and a stable pyro process. “Only with the fundamentals in place can AFR be scaled safely—without compromising clinker quality or production stability.”

He also flags a ground reality: India’s AFR streams are often seasonal and variable. “In one season to another season, there is major change… high variation in the quality,” he says, making preprocessing capacity and quality discipline mandatory.

Ramachandran argues the sector also needs ecosystem support: a framework for AFR preprocessing ‘hand-in-hand’ between government and private players, so fuels arrive in forms that can be used efficiently and consistently.

Design and execution discipline

Operational excellence is increasingly determined upstream—by the choices made in concept, layout, technology selection, operability and maintainability. Jain puts it unambiguously: “Long term performance is largely decided before the plant is commissioned.” A disciplined design avoids bottlenecks that are expensive to fix later; disciplined execution ensures safe, smooth start-up with fewer issues.

He highlights an often-missed factor: continuity between project and operations teams. “When knowledge transfer is strong and ownership carries beyond commissioning, the plant stabilises much faster… and lifecycle costs reduce significantly.”

What will define the next decade

Across the value chain, the future benchmark is clear: carbon intensity. “Carbon per ton will matter as much as cost per ton,” says Dr Hegde. Vokuda echoes it: the industry will shift from optimising cost per tonne to carbon per ton.

The pathway, however, is practical rather than idealistic—low-clinker and blended cements, higher thermal substitution, renewable power integration, WHRS scaling and tighter energy efficiency. Jain argues for policy realism: if blended cement can meet quality, why it shall not be allowed more widely, particularly in government projects, and why supplementary materials cannot be used more ambitiously where performance is proven.

At the same time, the sector must prepare for CCUS without waiting for it. Jain calls for CCUS readiness—designing plants so capture can be added later without disruptive retrofits—while acknowledging that large-scale rollout may take time as costs remain high.

Ultimately, operational excellence will belong to plants that integrate—not isolate—the levers: process stability, quality automation, structured AFR, predictive reliability, disciplined execution, secure digitalisation and continuous learning. As Dr Sabjan notes, success will not come from one department owning the change: “Everybody has to own it… then only… the results could be wonderful.”

And as Daga reminds the industry, the future will reward those who keep their feet on the ground while adopting the new: “I don’t buy technology for the sake of technology. It has to make a commercial sense.” In the next decade, that commercial sense will be written in two numbers—cost per tonne and carbon per tonne—delivered through stable, skilled and digitally disciplined operations.

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